I want to do the security hardening of my Squid Server with Iptables. I intend to have no rule on outbond traffic however ibound traffic would be restricted. please guide what are the minimum ports that are required to be open on iptables. Following is what i thought: Allow all incoming traffic from loopback adapter Allow SSH traffic incoming Allow 80,443,161,389 these multiple ports (389 as i intend to authenticate my clients from active directory) Allow Squid specific http_port (i am using 8080) Allow snmp port according to the defined directive (mine is 3161 & 7172) Deny all other incoming traffic Any other perhaps i am not calculating? Please guide me. thanks Regards, _________________________________________________________________ Hotmail: Trusted email with powerful SPAM protection. https://signup.live.com/signup.aspx?id=60969